Dataset pack

Customer contact completeness

A customer extract with many blank, whitespace-only and missing contact fields.

Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Profile completeness before cleaning.

customers 31 rows × 4 columns

Download customers.csv (Pro)

Data dictionary

id: Unique customer ID.
email: Email; may be blank.
phone: Phone; may be blank.
birth_date: Birth date; may be blank.

Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.